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DTSTART;TZID=America/Toronto:20230518T100000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20230518T110000
SUMMARY:Positive state polynomials
CLASS:PUBLIC
DESCRIPTION:Summary \n\nCS/MATH SEMINAR - IGOR KLEP\, UNIVERSITY OF LJUBLJA
 NA\n\nThe talk will discuss state polynomials\, i.e.\, polynomials in\nnon
 commuting variables and formal states of their products. The\nmotivation b
 ehind this theory arises from the study of correlations in\nquantum networ
 ks. We will give a state analog of Artin's solution to\nHilbert's 17th pro
 blem showing that state polynomials\, positive over\nall matrices and matr
 icial states\, are sums of squares with\ndenominators.\n\n \n 
DTSTAMP:20230609T140731Z
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